ERKEN SAKROİLİİT TANISINDA DİNAMİK MANYETİK REZONANS GÖRÜNTÜLEME VE SHORT TAU İNVERSİON RECOVERY (STIR) SEKANSININ KARŞILAŞTIRILMASI Sercan

INTRODUCTION: We aimed to compare short tau inversion recovery (STIR) sequences and dynamic magnetic resonance imaging (MRI) in early diagnosis of sacroiliitis and to evaluate the correlation between them and laboratory findings.
METHODS: One hundred thirty-seven patients who admitted to clinic of the Physical Therapy Rehabilitation and Rheumatology in Ankara University Faculty of Medicine between 2011-2015 were included. All of the patients were diagnosed with early sakroiliit. MRI images of all patients were included in the study. Subchondral sclerosis, erosion, periarticular fat accumulation, narrowing of the joint space / ankylosis, bone marrow edema (BME) / osteitis, synovitis, enthesitis, capsulitis symptoms were evaluated about sacroiliitis by MRI of the sacroiliac joint. Sacroiliac joint (SİJ) was separated superior and inferior by the imaginary line which passed through S2 vertebral body. Joint surfaces of SİJ were classified as sacral and iliac. Each SİJ were divided in 4 quadrants; namely total into eight segments bilaterally. CNR values which was calculated in dynamic MRI and STIR sequences were compared. The analysis of data was done in SPSS for Windows 20 programme, p<0.05 was accepted statistically significant.
RESULTS: Total of 137 patients whom 38.7%(n=53) were male and 61.3%(n=84) were female, mean age of 38.47, median age 38 (19-61) were included in our study. Statistically significant differences were detected in comparing signal noise ratio (CNR) values of dynamic MRI and STIR sequences. BME visibility was detected highly in dynamic MRI than STIR sequences (p = 0.003). There was no statistically significant relationship between the sedimentation value and BME (p = 0.288). However, there was a statistically significant association between CRP and BME (p = 0.001).
DISCUSSION AND CONCLUSION: We detected that STIR sequences has almost same success as dynamic MRI in detecting BME but the visibility of BME was found to be the most in dynamic MRI. There was no correlation between sedimentation and BME but there was correlation between CRP and BME.